Union assembly



muon ASSEMBLY Filed Dec. e, 1957 INVENTOR u mAM H. MmLelE BY W 9 M ATTORNEYS Patented- Jan. 17, 1939 UNITED .l STATES PATENT OFFICE y 2,144,117 -Y A y UNION ASSEMBLY William Rltiiller, Royal Oak, Mich., assignor to The Flex-O-Tube Company, Detroit, Mich., a corporation of Delaware l Application December 6, 1937, Serial No. 178,231

3 Claims.

This invention relates to union assemblies and in particular` to assemblies adapted to provide connection between lengths of pipe, hose and the like, or between a length of hose or pipe and a screw-threaded connection such asa nipple, valve or other screw-threaded attachment.

It is an object of this invention to provide, in such a construction, the utmost simplicity and strength.

It is a further object of this invention to provide such a construction which is comprised of two parts secured together under pressure to form a two-partunion assembly having therein a swivel joint v'which is leak-proof under high pres# sures, which'permits oi free relative rotary movement between the constituent parts and whereby the parts are so securely attached together as to beiincapable of separation under high interior pressures.

manner that uponl assembly a portion of one part is made complementary to a portion of another part, whereby the portions interlock to form a swivel union between the parts.

'I'hese andother objects and advantages will appear from the following description taken in connection with the drawing.V

In the drawing:

30 Figure 1 is a longitudinal section -of one part of a union assembly constructed accordingI to this invention before assembly;

Figure 2 is an end View of the structure shown in Figure 1, as seen from the left;

Figure 3 is a similar view of the structure of Figure 1, as seen from the right;

Figure 4 is a view similar to Figure 1, but showing the other part of the union assembly before its assembly to the parts shown in Figures 1, 2 and 3;

Figure 5 is an end View of the structure shown in Figure 4, as seen from the left;

Figure 6 is a similar View` of the structure shown in Figure 4, as seen from the right; and

Figure 7 is a longitudinal section of the assembled union assembly.

Referring to the drawing and with 'reference particularly to Figures-1, 2 and 3, the member'l which'is adapted for suitable .attachment to a 50 hose, pipe length or the like, comprises a cupshaped body with an interior annular wall 2 and a circular end Wall 3, from which projects axially outwardly the cylindrical extension 4 which is provided with a central axial bore 5 terminat l 55 ing outwardly in the conical surface 6.

It is a further object of this invention to pro-` vide a method of assembling the parts in such At the juncture of the extension 4 and outer surface 'I of the wall 3, the member I is provided with an annular groove 8 of arcuate section. The cylindrical recess formed by the annular wall 2 and end wall 3 is designated `9 and 5v is adapted to have the end of the hose, pipe or the like snugly tted thereinto and secured there in by upsetting portions of the cup-shaped portion of the member I to clampingly engage the' inserted hose or pipe, or by' any other suitable 1o means.

As shown in Figures 4, 5 and 6, the other member III, which with the member I comprises the union, is substantially cylindrical and isprovided with a central bore II extending therethrough from end to end, which bore is provided adjacent one end'of the member I0 with screw threads I2 by means ofwhich the member I0 may be screw-threadedly attached to any suitable nipple, valve stem or other screw-threaded connection having a seat to correspond with conical surface 6. At its opposite end, thefmember I0 is provided with an annular flat step I3, inwardly of which is formed a ring or annular portion I4 of arcuate section. The unthreaded 25 portion of the .bore II of the member I0 is adapted to closely engage the outer cylindrical surface of the cylindrical extension. 4 for free rotation between the parts I and III).

As will be clearly understood, when the parts I 30 and III, in the form shown `in Figures 1 to 6, are assembled, the parts I and I0 are freelyy separable, axially, from one another. However, in order to provide for free rotation therebetween while preventing relative axial movement therebetween when `attached together to form the union of this invention, the members .are assembled and pressure applied thereto by any suitable known means, in any suitable known manner, to force the edge portion I 4 securely into the 40 groove 8 and so distort the metal as to form from the portion I4 an annular retaining flange,- ring or bearing member I5 of arcuate section snugly tting the groove. 'I'he sections of the retaining flange I5 and groove 8 are complemen- 45 tary and, as the groove 8 forms, in eil'ect, an undercut shoulder in the cylindrical extension 4, when the parts are assembled, as shown in Figure 7, appreciable relative axial movement therebetween is totally prevented while free relative rotation is permitted therebetween.

y 'I'his free relative rotation permits of rotation of the member I0 for screw-threaded attachment thereof with a suitablenipple orthe like without rotation of the member I, whereby a hose, pipe ceptible of use in various widely divergent relatinships, it is particularly suitable for use on air and huid brake conduits and the like.

It will be understood that the above-described structure is merely illustrative of the manner in hich the principles of my invention may be utilized and that I desire to comprehend within my invention such modiiications as come within the scope of the claims and the invention. Y

Having thus fully described my invention, what I claim as new andl desire to secure by Letters Patent is:

l. A union assembly comprising a cup-like body adapted for connection to a hose and having an axial extension with a restricted axial bore and an annular external groove arcuate in cross section therein, and a second body having an internal bore snugly engaging the exterior of said extension and having integrally formed at one end thereof an annular retaining arcuate'ilange engaging and tting said groove and cooperating therewith to secure said bodies together against axial displacement while providing for free rela- 4 tive rotation.

2. A union assembly comprising a body having at one end a cylindrical recess adapted for attachment to the end of a conduit, a cylindrical extension at the other end of said body having an undercut arcuate groove arcuate in cross section therein, a second body having a bore with a portion snugly engaging the exterior oi the extension of said ilrst body and having screw threads in another portion of said bore, and an yintegral ilange on said second body arcuate in cross section and of less diameter than the bore oi' said body complementary to said groove and interengaging therewith to secure said bodies together for free rotation.

3. A union assembly comprising a cup-like body adapted for connection to a hose and having an axial extension with an annular undercut arcuate external groove therein, and a second body having an internal bore snugly engaging the exterior of said extension and having integrally formed Aat one end thereof an annular retaining arcuate ange, the parts being so constructed and arranged that the application of longitudinal pressure when the parts are in telescopic relation will cause the material ot the iiange to iiow into said undercut groove between the coupling parts.

WIILIAMH.LULIER- 

